十进制转二进制_PHP_编程开发_程序员俱乐部

class="php" name="code">
function dec2bin ($dec) {
    $flag = array();
    while ($dec != 0) {
         array_push($flag,$dec%2);
         $dec = (int)($dec/2);
    }
    $binstr = '';
    while (!empty($flag)) {
        $binstr .= array_pop($flag);
    }
    return $binstr;
}

echo dec2bin(7);

echo '<br/>';

echo base_convert(7,10,2);

echo '<br/>';

echo base_convert(1111,2,8);

echo '<br/>';

echo decbin(6);